George de laval



,(No Model.)

G. DE LAVAL.

GOMPENSATING PUMPING ENGINE.

No. 542,084. Patented July 2, 1895.

UN TTno STATES PATENT @rrioia GEORGE DE LAVAL, OFNVARREN, MASSACHUSETTS, ASSIGNOR TO THE GEO. F. BLAKE MANUFACTURING COMPANY, OF NEW YORK, N. Y.

COMPENSATING PUMPING-ENGINE.

SPECIFICATION forming part of Letters Patent No. 542,084, dated July 2, 1895. Application filed January 21, 1895. Serial No. 535,602. (No model.-

citizen of theUnited States, residing at War ren, in the county of Worcester and State of 5 Massachusetts, have invented an Improve ment in CompensatingPumpingEngines, of which the following is a specification.

In Letters Patent No. 520,237, granted to me May 22, 1894, a direct-acting pumping-engine is represented in which there is a compensating cylinder connected to the cross-head of the engine by a lever and toggle-links, so that the confined pressure in the compensating cylinder serves to unify the action of the engine andinsure the full movement of the crosshead in completing the stroke.

I have combined with the oompensating'devices, substantially similar to those in the aforesaid patent, a revolving shaft connect- 2 ing three pumps together, which shaft receives its motion from connections to the compensating levers, and from which revolving shaft ec centric connections extend to the valves of the engine, so that the revolving shaft serves to insure a regularity of action in the three engines and also allows for the valves to be moved by eccentric connections, instead of by the levers heretofore commonly employed in direct-acting engines, and no more space is occupied by the pumps than has heretofore been necessary in direct-acting engines and pumps.

In the drawings, Figure 1 is a plan view of the compensating pumping-engines, and Fig. 2 is an elevation.

The steam-cylinders are represented at A A A and the pumping-cylinders at B B B and the discharge of the water from the pumps passes by the pipe P to the air-vessel Q, and it is led from such pipe P in any desired manner, and at R is represented the inlet or suction pipe. At E the frames or connections between the cylinders are represented.

The present improvement is especially available in compound engines in which the steam is supplied to the cylinder A, which is the smallest, and from the same the exhauststeam passes into the cylinders A and A respectively, and the exhaust-pipes are repre- 50 sented at S, the steam passing from the valvechest to the cylinder A by the pipes T T to the valve-chests of the cylinders A and A respectively; and I remark that any desired character of valves may be made use of. I have, however, represented oscillating valves, the stems e of which are provided with cranks and connectionsf to the disks 9, that receive an oscillating motion from the rods h to the eccentrics 5 upon the crank-shaft U, and it is to be understood that these valves are constructed with reference to the proper admission of steam, so that the engine can be worked expansibly, or live steam might be admitted to each cylinder, so as to run the engines in the ordinary manner insteadof working expansibly.

Each engine is provided with a cross-head B and a link 4 to the lever II, that is pivoted at 16 and the opposite end connected at 15 to the rod of the plunger G in a cylinder F, to which a fluid under pressure is supplied or retained in the usual manner and acting as and for the purposes set forth in my aforesaid patent, and the pivot 16 is at the end of a crankarm 0, that is pivoted at 13, so that the-crankarm 0 and the portion of the lever H between 15 and 16 act as a toggle to compress the fluid in the cylinder F as the cross-head moves from one end toward the middle of its stroke, and the fluid in the cylinder F expands and acts through the connections to insure the proper movement of the direct-acting engine in completing its stroke. Thus each engine is compensated.

It is to be understood that the compensatin'g portion of this apparatus may be arranged in either of the ways illustrated in my aforesaid patent.

From the pivotal connection 16 in each of the engines a connecting-rod V extends to the crank-shaft U, and the cranks upon this shaft are placed at one hundred and twenty degrees apart in order that the movements of the respective engines and pistons may be in regular succession, and hence the water or other liquid, as acted upon bywthe pumps, will maintain as nearly a uniform flow as possible, and the crank-shaft and the connections to the same do not render it necessary to increase the distance between the pumping-cylinder and the steam-cylinder, and hence the engines as a whole do not occupy any more space in consequence of such crank-shaft being provided, and the crank-shaft is rotated by connections to the compensating devices, and such crank-shaft is comparatively light and inexpensive, because there is but little strain upon the same, and such crank-shaft and the connections therefrom move the valves without concussion and with little or no noise.

If there are four pumping engines, the cranks of the shaft will be at ninety degrees apart. If a fly-wheel is added to the shaft and the cranks placed at one hundred and eighty degrees apart, the present devices may be used with two pumping-engines.

I claim as my invention 1 The combination in a direct acting pu mping engine having two or more steam and pumping cylinders, of compensating cylinders and their connecting levers to each cross head, a shaft extending across the engines and having cranks at equal degrees apart, connecting rods between the cranks and the levers of the compensating devices for revolving the shaft, and connections from the revolving crank shaft to the valves of the engine, substantially as set forth.

2. The combination in a compound direct acting compensating pumping engine, of a high pressure cylinder, connections to the low pressure cylinders, valves for the respective engines, and means for actuatingthe same pumping cylinders and direct connections, compensating cylinders and connections between the plungers thereof and the respective cross heads, a shaft'supported by the engine frames and having cranks at equal distances apart, and connecting rods between the cranks and the levers of the c ompensating devices, for revolving the crank shaft sub stantially as set forth.

3. The combination in a compound direct acting compensating pumping engine, of a high pressure cylinder, connections to the low pressure cylinders, valves for the respective engines, pumping cylinders and direct connections, compensating cylinders and connections between the plungers thereof and the respective cross heads, a shaft supported by the engine frames and having cranks at equal distances apart, and connecting rods between the cranks and the levers of the compensating devices for revolving the crank-shaft, eccentrics on the crank shaft and connections to the valves of the respective cylinders, substantially as set forth.

Signed by me this th day of January, 1895.

GEORGE DE LAVAL. lVitnesses:

FRED E. 0001;, GEORGE P. ABORN. 

